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CODEBOOK FOR mhd_cpu.csv
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Description: Results from the computerized Monty Hall Dilemma

date: Date in yyyy-mm-dd format
time: Time in hh:mm:ss format
doors: Condition, i.e., number of doors presented (3 vs. 8)
block: Number of 500-trial block
trial: Trial number
posCorrect: Position of the correct door, given as a compass direction (e.g., S = South = bottom center, NE = North East = top right)
choice1: Circle that the subject selected initially, given as a compass direction
choice2: Circle that the subject selected second, given as a compass direction
strategy: stay (if choice1 and choice2 were the same) or switch (if choice1 and choice2 were different)
correct: True (if posCorrect and choice1 were the same, i.e., if the correct circle was selected on the final choice) or False (if posCorrect and choice1 were different, i.e., if a nonrewarded circle was selected)
species: Capuchin, Rhesus, or Human
subject: Individual identifier or name
order: Order of conditions (monkeys only), 3-8 (3-door condition first [block 0], 8-door condition second [block 1]), 8-3 (8-door condition first [block 0], 3-door condition second [block 1]), NA (not applicable for humans)

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CODEBOOK FOR mhd_1shot.csv and mhd_1shot_irr.csv
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Description: Raw data for classic one-shot Monty Hall Dilemma (mhd_1shot.csv) and double coding for inter-rater reliability (mhd_1shot_irr.csv)

Subject: Individual identifier
Doors1Shot: Condition, i.e., number of doors presented (3 vs. 8)
MHD_Decision: stay or switch
FamiliarWGame: Response to “Please also tell us if you were already familiar with this game [...]”, 1 = Yes, 0 = No
KnewCorrect: Response to “[...] and knew what the correct answer should be”, 1 = Yes, 0 = No
FiftyFifty: Coded 1 if participants referred to the chance of winning the car being equal between staying and switching (by using keywords such as “fifty fifty”, “50/50”, “50%”, “1/2”, or “coin flip”), coded 0 otherwise
Intuition: Coded 1 if participants indicated trust in their first choice (by using keywords such as “intuition”, “go with gut feeling”, “trust my instinct”, and “not second guessing”), coded 0 otherwise
LossAversion: Coded 1 if participants indicated feeling worse after switching and getting it wrong than after staying and getting it wrong, coded 0 otherwise
